Leyland DAF 400

Coolant capacity & service interval

Leyland DAF 400 coolant capacity ranges from 6,55 to 11 liters. Service intervals include changing at 40000 km or 48 months, checking at 60000 km or 12 months, and changing at 120000 km or 24 months. The data covers 4 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
V400 2.0 (1989-1992)
  • Use: Normal
  • Capacity 6,55 liter
  • Change 40000 km/ 48 months
V400 2.5 D (1989-1996)
  • Use: Normal
  • Capacity 11 liter
  • Check 60000 km/ 12 months
  • Change 120000 km/ 24 months
V400 2.5 TD (1989-1996)
  • Use: Normal
  • Capacity 11 liter
  • Check 60000 km/ 12 months
  • Change 120000 km/ 24 months
V400 3.5 (1989-1999)
  • Use: Normal
  • Capacity 9,7 liter
  • Check 60000 km/ 12 months
  • Change 120000 km/ 24 months

Additional Notes

  • The Leyland DAF 400 V400 2.0 carries a cooling system capacity of 6.55 liters, the smallest figure across all four engine variants listed. A lower coolant volume generally reflects a smaller displacement engine with a less extensive cooling circuit.
  • Both the V400 2.5 D and V400 2.5 TD share an identical 11-liter cooling system capacity, the largest among the listed configurations. An 11-liter fill is consistent with the greater thermal demands placed on diesel and turbodiesel engines relative to smaller petrol units.
  • The V400 3.5 sits between the 2.0 and the 2.5-liter variants with a 9.7-liter cooling system capacity, despite having the largest engine displacement in the group. Cooling circuit volume does not always scale directly with displacement, as factors such as engine architecture and block design influence total system size.
  • The V400 2.0 (1989-1992) carries no separate check interval in its specification, only a single change interval of 40,000 km or 48 months under normal use conditions. A 48-month maximum change interval is relatively long for a coolant service schedule and reflects the extended service life of modern antifreeze formulations when used in a properly maintained system.
  • The V400 2.5 D and V400 2.5 TD both specify a coolant check at 60,000 km or 12 months, followed by a full change at 120,000 km or 24 months under normal use. The separation of check and change intervals allows for condition monitoring without requiring a full drain and refill at every service point.
  • The V400 3.5 (1989-1999) follows the same check and change interval structure as the 2.5-liter diesel variants, with a check at 60,000 km or 12 months and a change at 120,000 km or 24 months under normal use. The shared interval pattern across these three engines suggests a common service schedule framework applied to the larger-capacity variants in the 400 range.
  • The V400 2.5 D and V400 2.5 TD cover the model years 1989-1996, while the V400 3.5 spans 1989-1999. The longer production window of the 3.5-liter variant means the same 120,000 km or 24-month coolant change interval applied across a wider range of service years for that engine.

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